Finger-prints, Gallon's papers on, ii. [48]-9
"First Principles," Spencer's, Wallace's admiration of, i. 125
Fish, sexual differences in, i. 178
Fisher, Mrs. (see Buckley, Miss)
—— O., "Physics of the Earth's Crust," Wallace on, ii. [74]
FitzRoy, Capt., i. 33
Flight, theory of, i. 145-6, ii. [25] et seq.
Flora, endemic, ii. [43]
"Floral Structures," Henslow's, ii. [46]
Flourens' criticism of Darwin's theory, i. 160